Saw-guide



2 Sheets-Sheet 1.

(No Model.) J W. MAXWELL.

SAW GUIDE.

No. 384,773.. Patented June 19, 1888.

u u M 1 wvcmeowa,

. Pllolo-Uflwgnphor. Wuhington. D. C.

UNITED STATES PATENT OFFICE.

, JOSEPH W. llIAXWELL, OF LOUISVILLE, KENTUCKY.

SAW-GUIDE.

SPECIFICATION forming part of Letters Patent No. 384,773, dated June 19,1888.-

Applicfltion filed December 8, 1887. Serial No. 257,345.

To aZZ whom it may concern:

Be it known that l, J OSEPH W. MAXWELL, a citizen of the United States,residing at Louisville, in the county of Jefferson and State ofKentucky, have invented certain new and useful Improvements inSaw-Guides; and I do hereby declare the following to be a full, clear,and exact description of theinvention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to that class of saw- I guides which are adaptedto guide hoop-poles,

so that hoops of even thickness throughout their length may beautomatically sawed therefrom, and which are further adapted to guidework to be sawed according to a pattern; and the object of the inventionis to provide means whereby one or more guide-rollers following theoutline of a hoop-pole or a pattern will act upon the saw-blade in atwisting manner to guide or deflect it from side to side, so that itskerf will be parallel with the guide-pattern or the side of thehoop-pole.

To this end my invention consists, first, in means for giving the guideroller or rollers a concentric motion with the saw-guide and yet leavesome slight freedom of motion between the guide and the roller orrollers; second, in means for permitting one of two guide-rollers toyield to accommodate sudden great deviations in the direction of theguidingpattern; third, in means for adjusting the guide-rollersrelatively to the guide to establish the thickness of hoop or other workdesired; fourth, in, means for giving automatic tension to hold theguide in one general-direction; also for suddenly throwing the force oftension either to the right or left; and, fifth, in means for openingand adjusting the yoke to fit the parts carried therein, as hereinafterdescribed and claimed, reference being had to the accompanying drawings,in which V is a longitudinal vertical section on the line 1 slots 20,through which binding-bolts pass into (No model.)

at m of Fig. I ll, showing a portion of each of the two sideguide-rollers in elevation.

1.0 represents two portions of the yoke, one V 5 5 overlapping the othermidway the backbone 13, and provided with a slot, -11, andbindingscr-ews therein, whereby the two parts may be joined and adjustedvertically to fit the parts contained in-the yoke and then be rigidlyfixed together.

12 represents brackets fixed to the yoke by screws as a rigid partthereof when in service.

14 represents the saw'guidcs, consisting each of a block of wood orother suitable material slotted to permit the saw 38 to run through itand to bear upon the sides of the saw in guiding it. Each guide 14 isfitted to slidein a box, 15, having trunnions 16,journaled at one end inthe yoke 10 and at the other end in the bracket 12.

17 represents a binding-screw whereby the guide-block 14 may be fixed inthe box 15, so-

that it may be set to guide the saw to coincide with the axial line ofthe trunnions, or to pass forward of it or back of it, as may berequired.

18 is the gage-roller, j ournaled in boxes 19, nearly opposite thecenter of the trunnion 16. Each box 19 is provided with longitudinaltransverse slots 21 in a deflector, 22. This deflector is pivoted at 23to the box 15, and is provided with a segmental slot, 24, Fig. II, whichrepresents the lower deflector concen trio with the trunnions 16 toengagea pin, 25, 8 fixed in the bracket 12; or the slot may be in thebracket 12 and the pin on the deflector 22, as shown in Fig. I.

26 represents the forward guide-roller or pattern follower, journaled inan arm, 27, which is pivoted to the box19. (See Fig. V.) This pivot ispreferably the journal of the roller 18; but it is not necessarily so,nor necessarily concentric therewith. I

28 is a spring acting between the box 19 and the arm 27 to maintain thetwo in their normal position, as shown, relative to each other.

29 represents two yokes joining the upper and lower deflectors 22 toforce them to act in unison as a single frame for the rollers. The yokes29 are provided with lap-joints 30, having slots and binding-screws,whereby they rated for the introduction of the rollers, 81c.

31 and 32 represent weights connected with the two ends of the deflector22 by means of cords passing over pulleys 33.

34. and 35 represent two treadles connected, respectively, with theweights 31 and 32.

36 and 37 are bed-rollers over which the hoop-pole passes in beingsawed.

The operation is as follows: The hoop-pole, being pushed by the operatorover the bedroller 36 and beside the guide-roller 26 and the gage-roller18, is entered by the saw, by which a hoop is cut from the pole. Iprefer to locate the roller 18 beside the edge of the saw by means ofthe slots 20 in the box 19, and at a distance t'rom'the saw equal to thethickness of the required hoop by means of the slots 21, and then bindthe box 19 firmly to the deflector 22. When a crook in the pole arrivesat the roller 26, the roller is moved thereby to the right or left fromits normal posit-ion, carrying with it the deflector 22, and that beingconnected at 23 with the box of the saw-guide deflects the saw in adirection parallel with the guiding side of the hoop, thus assisting thegage roller in maintaining an even thickness to the hoop. Theguide-block 14 is adjustable in the box 15 longitudinally with thesawpath, and may be fixed by the screw 17 at the desired point to givethe saw the amount of movement required to follow parallel with theguide and gage rollers. The segmental slot 24 is concentric with thetrunnions 16 to maintain the roller 18 at the fixed distance from thesaw at all times when the deflector is swung from side to side bycrooked poles. If a large knot comes in contact with the roller 26, thespring 28 permits the arm 27 and the roller 26 to yield, so as not totwist the saw more suddenly than it can cut its passage-way. Otherwisethe saw is likely to be broken by knots. Before the knot reaches thegage-roller 18 the spring 28, acting through the parts described, willhave forced the saw to make its shortest practicable turn into the knot,so that the latter will pass the gageroller. In some kinds of sawing itis preferable to make the forward roller, 26, the gageroller, andsometimes the rollers may be set at different distances before or behindthe plane of the saw-edge. All these adaptations are provided for by theslots 20. In some cases it becomes necessary to cant the pole forciblyto one side, in which case the operator presses his foot on thattreadle, which will raise the opposing weight and permit the properweight to act with full force to cant the deflector.

In practice it may be found advantageous to make one of the weights, 31or 32, heavier than the other to give a permanent tension or cant to thedeflector, or either weight may be set out upon its supporting-arm forthe same purpose. The rollers and their supports may be placed either tothe right or left of the saw, and in case they are to follow a fixedform-pattern theymay be placed farenough from the saw to admit thepattern between the saw and the rollers, or the pattern may be set toact on the opposite side of the rollers from the saw. The lap-joints 30and 11 permit the yoke and the deflectors to be adjusted to the otherparts. The gage-rollers and the yielding guide-roller would beserviceable in other combinations than those here shown. One trunnion tothe saw-bearing box, either above or below the box and made long enoughto preserve the parts in line, would be an equivalent of two bearings onone box; or one trunnion on the upper box mated by another trunnion onthe lower box, and the two boxes joined to operate as one, would beanother equivalent of the same. These trunnions are only enlarged pivotsand may be as large as occasion requires. It is immaterial whether thesegmental slot 24 be in the deflector and the pin 25 fixed in the frameor the reverse, and two pins might receive a solid segment between themand produce the same result. The roller-box when fastened to thedeflector becomes a part of the deflector in {practice One weightpressing the guide-roller constantly toward the hoop or pattern and onetreadle to overcome such aweight would accomplish the purpose aimed atto a limited extent. If each treadle were attached directly to itsweight without its attaching-cord passing over a roller, it would aidthe weight and produce the same result in a more positive manner, butwith greater strain on the parts.

Having thus fully described my invention, what I desire to secure byLetters Patent is the following:

1. The combination, in a' saw-guide, of a bearingblock slotted toreceive the saw-blade, a box fitted for the said block to slidelongitudinally in and hung by means of trunnions journaled in bearingsin the machine-frame partially surrounding the saw, means for adjustingthe bearing-block longitudinally in the box, the said box constitutingan arm extending rearward from its trunnions, and guiderollers journaledin the deflector-frame connected with the said arm, substantially asshown and described.

2. The combination of a machine'frame, a"

saw-guide in a box hung upon trunnions therein and provided with an armextending away from the bearings, a deflector fitted to move in themachine frame upon a pin engaging a slot which is a segment of a circleconcentric with the said trunnions, the said deflector and frameconstituting two membersof a sliding joint and the said slot being inone member and the said pin fixed to the other member, the deflectorbeing pivoted to the said arm of the bearing-box, and guide-rollersjournaled in the deflector parallel with the saw, substantially as shownand described.

3. The combination of a saw-guidej ournaled in the machineframeparallel. with the line of the saw, aframe hung in the machine-frame tomove concentrically with the said sawguide, a roller or rollersjournaled in bearings fitted to the said movable frame, and means foradjusting the said bearings both longitudinally and transversely in theframe, substantially as shown and described. i

4. The combination of saw-guides hung in a frame upon journals which arenear to and parallel with the line of the saw, and provided with anextending arm, a deflector freely pivoted to the said arm, a guideroller or rollers j ournaled parallel with thesaw in the deflector,

and guides communicating between the de flector and the frame,substantially as shown and described, whereby the deflector is guided tomove concentrically with the said saw-bearing journals.

5. The combination ofa saw-guidejournaled parallel with the line of thesaw, two guiderollers journaled in separate supports or boxes andconnected with the saw-guides, one of the said boxes being hung to movetoward and away from the saw, and a spring fitted to press the movableroller toward the saw, substantially as shown and described.

6. The combination of a j ournaled sawguide, a frame hungto moveconcentrically therewith and connected therewith, a guide-rollerjournaled in the said frame, another roller journaled in bearingspivotal] y connected with the said frame, and a spring acting betweenthe said frame and bearings, substantially as shown and described.

guide and a roller therefor, of a weight connected with the saw-guideand roller, and a treadle connected with the weight, substantially asshown and described, whereby the action of the weight may be suspended;

9. The combination of a frame, 10, formed in two parts,having an adjustablelappedjoint, saw-guides journaled in the same frame, and

guide-rollers journaled in a frameconcentric with the said saw-guides,the said roller-frame having a lapped joint, substantially as shown anddescribed. v a

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH w. MAXWELL.

Witnesses:

O. B. SEYMOUR, FINLAY F. BUSH.

